OD/OF/OA Series Little Demon(R) Carbon Composition Molded OD/OF Series (5% Tol.) OA Series (10%) F e at u r e s * Molded insulation for high dielectric strength * Rugged construction * High surge capabilities * Comparable to "Mil" RC07, RC20, and RC32 types * OD/OF Series available in E24 values * OA Series available in E12 values Discontinuance Notice: OA series is not recommended for new designs. The OA series will no longer be available for new orders after 8-30-14. After this date existing stock will be sold until depleted. Ohmite's Little Demons are small, reliable carbon composition resistors with exceptional strength. They are made tough by a molding process that combines the terminals, insulation and resistive element into an integrated unit. Along with their small size, Little Demons perform with low noise, dissipate heat rapidly and offer high temperature stability. Color codes are readable even after prolonged use thanks to a very durable coating that resists abrasions and chipping normally associated with automatic insertion equipment. S e r i e s s p e c i f i c at i o n s Series Mil-R-11 Type OD RC07 OF RC20 OA Wattage 0.25 0.50 1.00 Ohms 2.2-5.6M 2.2-20M 2.2-1M Tolerance 5% 5% 10% Max. Voltage 250 350 500 Dielectric VAC 500 700 1000 Characteristics Terminals Solder-coated copper terminal. 100,000 Body Molded Phenolic Single Pulse Power Capability Tolerance 5% (OD/OF); 10% (OA) Derating Linearly from 100% @ +70C to 0% @ 130C Pulse Power (W) 10,000 OF 1,000 OD 100 10 1 10-7 10-6 10-5 10-4 10-3 10-2 Pulse width (s) 10-1 1 Dimensions 1.135" 0.12 / 28.83mm 3 (OA: 1.18" / 30.0mm) L D Series Length max. Diam. max. Lead Dia. OD 0.276 / 7.0 0.098 / 2.5 0.024/0.60 OA 0.591 /15.0 0.236 / 6.0 0.035/0.92 OF 0.406 /10.3 0.150 / 3.8 0.028/0.70 (continued) 92 1-866-9-OHMITE * Int'l 1-847-258-0300 * Fax 1-847-574-7522 * www.ohmite.com * info@ohmite.com OD/OF/OA Series Little Demon(R) Carbon Composition Molded OD/OF Series (5% Tol.) OA Series (10%) pa c k a g i n g Storage: Ohmite recommends storing carbon composition resistors in a controlled environment at a temperature of 5 to 35C and relative humidity of less than 60%. Inventory should always be used on a first-in-first-out basis. All resistors are packaged in sealed poly bags with desiccant to maintain a consistent humidity during storage. If parts are removed from the protective plastic bag they should be used as soon as possible or resealed in the plastic bag. Tape/Reel OD OF Qty./reel 5000 3000 Reel size (mm) 260 260 Qty./carton 40,000 24,000 Gross carton wt. (kg) 12 13 Carton size (m3) 0.04 0.04 Ammo Box OD 0.5mm max. 52.4mm +1.6 -1.4 6mm .5 260mm 5 275mm 5 (OD) 455mm 5 (OF) 5.08mm .38 OF 1mm max. 60mm 5 (OD) 65mm 5 (OF) L1 L2 3.2mm min. L1 - L2 = 1mm max. 14.5mm .5 75mm 5 Tape width (mm) 52 52 Qty./box 2000 2000 Qty./carton 30,000 30,000 Gross carton wt. (kg) 10 16 Carton size (m3) 0.03 0.05 280mm (ref.) 75mm 5 3mm 60.4mm1 60.4mm 1 resistor use guidelines Carbon composition resistors are manufactured by extruding a blend of carbon and organic binders inside a phenolic outer body. The extrusion is cut to length, leads inserted, cured, and marked to form a finished resistor. The carbon and binder mixture is adjusted to produce different resistance values. The resistors are sorted for 5%, 10%, and 20% tolerance values. Carbon composition resistors are able to withstand larger short-term pulses and higher voltages than film resistors and are virtually impervious to ESD events (Electro-static discharge). Carbon composition resistors are also sensitive to moisture and, therefore, storage recommendations should be adhered to. Generally, any moisture absorbed during storage will be "baked out" during the soldering operation. If the product is stored properly the resistance shift during the soldering operation will be minimal, less than 2% or 3%. Carbon composition resistors are highly hygroscopic and changes in resistance value can occur if too much moisture is absorbed. For this reason, it is recommended not to use water or water-soluble solvents to clean these components. Alcohol or hydrocarbon solvents are recommended for rinsing. bake procedure A. Heat Treatment 110C 10C 15 hours B. Frequency of heat treatment 1 time only C. Solder heat test after treatment Solder Dip Type Temp. Time Evaluation OD 300C 3 sec within 3% OF 350C 3 sec within 3% *Depth of Immersion: 3mm from the resistor body D. Cautions Solderability: may be affected due to oxidization of lead wire Resistance value: some units may not completely recover to original value. Soldering heat: some treated product may have substantial resistance change during soldering operation. It is recommended that parts be tested to evaluate soldering heat effects. O R D ERING IN F O RM A TI O N * OD/OF Series available in E24 values * OA Series available in E12 values Tape & reel RoHS compliant optional O D 6 8 3 J E -TR Series Ohms Tolerance OD 68G = 6.8 OD, OF: J = 5% OF 680 = 68 OA: K = 10% OA 681 = 680 682 = 6,800 683 = 68,000 684 = 680,000 1-866-9-OHMITE * Int'l 1-847-258-0300 * Fax 1-847-574-7522 * www.ohmite.com * info@ohmite.com 93 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Ohmite: OF124J OA104K OD222J OD220J OD22GJ OD224J OD103J OF150J OF151J OF154J OF153J OF131J OD561J OD471J OD473J OF122J OD122J OF392J OF270J OF273J OF272J OF390J OF274J OF394J OA151K OA150K OA152K OA103K OA105K OA102K OA101K OF474J OF470J OF472J OF471J OF22GJ OF203J OF473J OF47GJ OF393J OF271J OF27GJ OF391J OF152J OD152J OA122K OD221J OA393K OA391K OA390K OF331J OF33GJ OF333J OF221J OF220J OF222J OF224J OD180J OD104J OA471K OA474K OA470K OA473K OD470J OD474J OD472J OD47GJ OD394J OD27GJ OD392J OD272J OD270J OD274J OD391J OD393J OD273J OD390J OD271J OD332J OD330J OF330J OF332J OF334J OD105J OD102J OD101J OD33GJ OD333J OD331J OD153J OD150J OD154J OD151J OD181J OD203J OA184K OA333K OA22GK OA224K OA220K